Computer display screen or portion thereof with graphical user interface



FIG. 1 is a front view of a first embodiment of a computer display screen or portion thereof with graphical user interface showing the new design; and,

FIG. 2 is a front view of a second embodiment thereof.

The broken lines showing a computer display screen or portion thereof with graphical user interface illustrate environment and form no part of the claimed design. 

CLAIM The ornamental design for a computer display screen or portion thereof with graphical user interface, as shown and described. 